Anyone willing to help me with merging two branches of PGP 2.6.3?

Anyone willing to help me with merging two branches of PGP 2.6.3?
I need single functionality from one slightly older 2.6.3 branch merged into much newer 2.6.3 version.
The target will be DJGPP and DOS.
Please answer me with serious help offers only to get all the details and source code needed.